Fluid-pressure-operated mechanism



F611 1948. F. c. EASTMAN FLUID- PRES SURE- OPERATED 'MECHAN I S M Filed Aug. 28, 1942 3 Sheets-Sheet 1 R WW A i i I I 4 %w \v v a N 1@ g y H 1.. N g Q j Q A K & a NH 1% 9 Q \N\ M & 5 n

Feb. 24, 1948. c, EASTMAN 2,436,424

FLUID-PRESSURE-OPERATED MECHANISM Filed Aug. 28, 1942 3 Sheets-Sheet 3 "engaging member into engagement with a work Patented Feb. 24, 1948 UNITED STATES PATENT OFFICE FLUID-PRESSURE-OPERATED MECHANISM Fred C. Eastman, Marblehead, Mass., assignor to United Shoe Machinery Corporation,'Flemington, N. J a corporation of New Jersey Application August 28, 1942, Serial No. 456,564

' 17 Claims.

An object of the invention is to provide a machine having a work-engaging member, fluidpressure-operated means for moving'the workpiece and other fluid-pressure means for turning the work-engaging member while it is in engagement with a' work piece. More specifically it is an object of the invention to provide an improved fuse-setting machine having fuse-setting means 'movable by fluid pressure into engagement with the fuse-adjusting member of a shell and fluid-pressure means for imparting -rotative movement to the support for the fusesetting means while the fuse-setting means is in engagement with the fuse-adjusting member. 3

In accordance with a feature of the invention the work-engaging means is movable by fluid pressure into engagement with afwork piece in response to movement of the work piece into position to be operated 'upon' by the workengaging means and rotatlve movement is imparted to the work-engaging means by other fluid-pressure means after the work-engaging "means has been thus moved into engagement with the work piece. In order to prevent rotation of at least a portion of the workpiece while the work-engaging means operating on the Work piece, holding means are provided for looking at least a portion of the work piece against turning. These'holding means are automatically actuated in accordance with a further feature of the invention in response to the engagement of "the work piece by the work-engaging means but prior to turning movement of the work-engaging means. 'In accordance withastill further feature of the invention, provision is made for automatically terminating the rotative move- Ement of the-work-engaging means at a predetermined time and moving the work-engaging means out of engagement with the work piece.

When operating to setthe fuse of a shell, the

work-engaging means, which may be in the form :of a plurality of fuse-'settingknives', is moved intoengagement-witlr the fuse ring of the shell :under 'suflicient pressure to" cause the knives ifirmlyto grip" the fuse ring. "In order to prevent the ifuse ringirombinding' against the ad- 2 pressure applied by the knives to the fuse ring, and in accordance with a further feature of the invention, provision is made for automatically decreasing the effective pressure on the fluidpressure means by which the knives are moved into engagement with the fuse ring prior to the turning movement of the knives for setting the fuse.

In accordance with a still 'further feature of the invention, the fiuid-pressure-operated mechanism comprisesa fluid-pressure motor having means for directing fluid under pressure to one side of the movable element of the motor and for exhausting fluid from the other side of the movable element, and means arranged automatically to cutoff the exhaust from said other side in response to an increase in pressure of the fluid on the first side for stalling the motor and then, after a predetermined time, admitting fluid under pressure to the other side of the movable element while exhausting it from the first side, thus causing the movable element to return to its original position. v The aboveand other features of the invention, including novel details of construction and com binations of parts, will now be more particularly described by reference to the accompanying drawings and pointed out in the claims.

In the drawings, Fig. 1 is a view in side elevation of a machine in which the invention is embodied; I Fig. 2 is a plan view of a portion of the ma-' chine shown in Fig. 1; I

Fig. 3 is a bottom plan view of the portion of the machine shown in Fig. 2;

Fig.4 is a vertical longitudinal section through the machine on a larger scale than Figs. 1 to 3: Fig. 5 is a schematic view, partly in section, of the portion of the machine shown in Fig. 2;

Figs. 6, 7 and 8 aresectional views through the main control valve of the machine, showing the valve in different positions;

Figs. 9 and 10 are sectional views through anothier valve, showing it in two different positions; an

Fig. 11 is a vertical section through the work-- supplied tothe gun may be carried by a suit- :r jacentrsmface'oiithexsliell:by reasonoi- 'the heavy 55 able magazine Hiv from which they are transferred. successively into ruse-setting position and then into ramming position by a transfer tray ii -f m mem 3 l6. This tray is secured by a depending arm l8 to a pair'of links 20 and 22. The link 22 is journaled On a lateral extension of a trunnion 24 by which the gun is supported and the link 20 is connected by a link 26 to the trunnion. A duplicate set of links (not shown) may be provided-at the opposite side of the gun better to support rthe tr ay. t e. rod 28-;eonn ect ed -to the link 22 serves toraise and 1 wer the link, thereby to move the transfer tray vertically. The rod 28 may be manually operated or may be power operated by suitable mech 8 ,I i (not shown). The tray is movable upwardly-from -the-position illustrated to receive a shell-from the magazine 14, after which it is lowered-. to-carry the shell into position to have its fuse set by themechanism l0. At the conclusion of the fuse-setting operation, the tray is lowered 'stilifurther to carry the shell into alinement with the breech---of the gun, whereupon a rainmer 30 force th shell intothe bree h. "e f I .The tting ine'chans'in'lfl comprises a plurality fknives 32' .(one of'which is shownin which are preferably three in number and efeer e rt e l ii fiat. points sp ced'app is ately 120 apart. 1 .94 .7 -k e 3 'is" ibllm 9, El e- 2nd [Of a lever: 34 pivoted at' 36 betwenstacedearsaa projecting putwardly from .a rotatable support 40. Sur- 'gounaingu e n erends 'of the leversis a spring t lt -the ever 1 g ni es 3?; outwardly .hesupp ort. A plunger Lis normally 'maintained in-the position shown iii-Fig. eito holdfithellin er endspf the levers 34. separated-against f ';;e of. the spring 42, thefeby maintainingI v niyes 32 in operative positions. "The-support -is rotatable within a housing i ie lsolthat i maybe turned relatively to. thehousingafter he knives-are in engagement with the fusering Eithereby to tur the f s ri g fideet he tee- 'e 'ei ti eii e mi n-ere t th t m rality of pins 48, preferably threein number, are e deb e w t i byesee -59 ne .d-in h forward i' eheie ie 4e nsiere m l toward e Shell tovgrip t rearwargly-ofthe fuse ring,

asimuaraiegt in tial 11.. Bllcrank levers 52 pivoted between earis ii'gfl oni the housing 46 engage the outer ends of the pins for-moving them iewere 1 9 en e emee yv t i he e These levers are connected-by Il k 5i; to pistons 58 slidable-in cylinders fillformeddn-the housing 48 so'th'at upon'the' introd tien 9f. fluid. under pressure in the v cyii riders;behind-th iston the pins are "moved into g pp elationsl-iip rwith the r-shell. The pin 4'8 e provided with heads 5 i h h me at th Pies from, d e from theb'osses '59 when r-ioshellrisbeing operated PQ iTlieLhou'sing 46' .is.inovable lengthwise of the in Eig. 11. For-"this osethe housing is seture by a s '5 it E and 3) to ro '56 movable lengthwise of the gun. The forward ends of the rods are supported-for sliding moveme flfl inla frame member: fiaewhichis in turn secur'd'to bar ca ied-bythe breech endof the gun. I The rea ard-endsof the rods 64,66 are" rerm u' s pist ns-12,14 (Fig; 5) slidable in cylinders"1, 1=8. "These'cyIinderS-are formed in 'er 8Q 'w ch'isralso secured to the "'th" in't' duction of fluid under 6', 18 behind the pisrin F r a shell or holding the shell the arms 62, 63 are moved in a direction to carry the hous ing 46 and the support 40' for the knives toward the shell S until the knives are forced into en gagement with the fuse ring F, as shown in Fig. 5 11. The pins 48 are then moved into engagement with the shell back of the fuse ring, as will be described, to hold the shell against rotative movement-after -which the-support 40; and with it the kriiiges" 32', is rpfltraizlid3a} predetermined 10 amount to set the fuse. After the fuse has been .-*.properly set, the turning movement of the support 49 is interrupted and the plunger 44 is re- L-tracted-'to-perniit the knives 32 to be moved by the spring. outwardly of the support 40 and but ot' eng-agemenjt with the fuse ring. The levers 52,-aoting on tire -pins 48 are then operated to release the force exerted by the pins 48 on the -"slielli after Whibh the housing 46 is moved back .to=its -i-r itial position so that the shell with the 20 fuse properly set may be moved by the tray 16 into ramming position. g

"The?" .op tions is" controlled; at least iit lte e" i e isflfw sociated' with the'e'ylindef '16. I comprises" a uue'v'alve H g I aip'air of valve ele memsts andag fslidalqlgwitniiifa valve' cliamber 9- ui ndei'ii tfl e e t d b up ply pipe 32' into the-valve bhanibe'r betweenthe the'valvecham r t o I h an'eig'haust port '9 ,;a spring-pressed I heck'v lv 96 which prevents es,- eapeof fluid from-"tn valve: chamber untiY-the. pressure has reached a predetermine amount, d h -ne tp e1 quid r s rv r (nee-shown) by way of'a pipe #1. 'I-he rearward. fi id of the valve member 841s formedas apist'on 3,8 whichis sub; =ie ed.--dur n, he e operati o the 'e ite pressure on its-rearwardside to cause the valve to moye to th left mm the position show m E i tieter: and 409 formeddn the. wall lll,l between the valve sh eet ari the-w iede i m d e m ela i e etween t e Veiiiet emh rn p o i e ds-bfthey ndergh-ef e mbe -tees formed with at passageway 1112? providing cornmu efl be ween he o e de of the-valve eleme ts-weeds 8.8 t-he elvame ev km]- -cludes agv ve l-ste n Ill4-"v 1 e riextends;- through 50 the forward wall-of he valve -chamber- ;and--te thev euten-endo uhi hisee r da fin r av n a e recen e. face-9 hey in en t6. Fo r s ra n.- e m ement-9i h valve-memberfrom th pes5 e tlen'ehownin Rig? fi-undee he influence of-pres l .--a0--' d'- +fin ;err .46. -Notches; HA/and im l e Qt tiQne m i9n =59 te carry the knives 32 into enga ement with-the fuse ring, as shown =71; M-ithpthewezive; membemittumathenposition 30 valve ler'i'ieiits '86"and"'8 8, "mum exhaustsfifro'in direction to-move the AStep-manner. 'Passageways '99 shown in Fig. 5 both the passageways 99 and I are closed by the valve elements 88 and 88 respectively and the machine is at rest. Provision is made for moving the valve member from the position of Fig. into the position shown in Fig. 6. For this purpose a rod I28 located in front of the finger I08 'on the valve stem I04 is supported for lengthwise movement in bosses I22, I24 (Fig. 2) projecting upwardly from the cylinder I8 and the frame member 88 respectively. Pivoted to the upper surface of the frame member 88 is a lever I28 having an end engageable with the adjacent end of the rod I20. Theother end of this lever is connected by a link I28 (Fig. 4) to a lever I80 pivoted at I32 on the frame member 88. The

lower end of the lever I is bent at I34 to be eneaged by the'nose of a. shell as it is moved down-- wardly by the transfer tray I8 into the fuse-setting position. As this shell is thus moved downwarelly, the lever I30 is moved in a counterclockwise direction, as viewed in Fig. 4, and acts through the link I28 and the lever I28 to move the rod'l20 in the direction to move the valve member from the position of Fig, 5 to the position shown in Fig. 6. The valve member is maintained in the position shown in Fig. 5 when the machine is at rest by the latch I08, which acts on the finger to maintain it in engagement with a screw I38, carried by an extension I38 of one of the arms 83. Upon movement of the valve member to the position shown in Fig. 6 in response to movement 'of a shell into fuse-setting position, the passageways 99 and I00 are uncovered and fluid under pressure flows through .the passageway I00 into the cylinder'I8 behind-the piston I2. Pipes I40 and I42 connect the cylinders I8 and I8 together at their two ends so that the fluid under pressure also flows through the pipe I40 into the cylinder I8 behind the piston I4, The'pistonsnow move to the left to move the housing 48 toward the shell S and to force the knives 32 against the fuse ring F. During this movement of the pistons, the fluid in the left-hand' -end of thecylinders exhausts through the passageway 99, the passageway I02 in the valve member and the outlet port 94. The passageway I 00 between the valve chamber and the cylinder I8 also communicates by way of a port 'I4I with the valve chamber behind.

the piston 98. After thepistons have moved sufficiently to force the knives 32 into contact with the fuse ring F, the pressure of the operating fluid will increase and will act on the valve DIS-s ton 98 to overcome the holding efiect of the latch I08. thereby moving the valve into the position I shown in Fi '7. With the valve member in this position, the passageway 99 is closed by the valve element 88 so that the fluid in front of the pistons I2 and is trapped and the pistons stall thereby limiting the force, exerted by the knives on the fuse ring.

The piston I2 and rod 84 are provided with a passageway I44 (Fig. 5) which opens into the right-hand end of thecylinder I8 and the other end of the passageway is connected by a pipe I48 with a valve chamber I48 of a control valve I50. This valve chamber is formed in the housing 48,

as shown in Fig. 4, and a passageway I 52 provides communication with one of the cylinders behind the piston 58 therein. Pipes I54 provide communication between the cylinder 80 of Fig.

and the other cylinders 80 so that upon the introduction of fluid under pressure into the cylinder shown in this figure, all the pistons 88 will be operated to move the pins 48 into locking engage 6 ment with the shell. The valve I50 comprises a valve member I58 which includes a pair of valve elements I58 and I80. The valve" member is maintained in the position shown in Fig. 5 when the machine is at rest by a spring I82 acting through a bell-crank lever I84 on the valve stem I88. The spring I82 is adjustably supported by a. screw I88 threaded in a wall I89 of the housing 48. When the valve member I58 is in the position shown iii-Fig. 5, the passageway I52 is closed by the valve member I58 to fluid under pressure in the pipe I48, The fluid under pressure behind the piston I2 acts through the passageway therein and the pipe I48 on the control valve I50 to move the valve against the force of the spring I82 after the pressure reaches a value determined by the setting of the spring I82. The pressure reaches this value only after the valve member 84 has been moved from the position of Fig.

6 into the position of Fig. 7, whereupon the valve member I 58 moves into the position of Fig. 9 permitting flow of fluid under pressure into the cytinders 80 to move the pistons 58 outwardly there of whereupon the pins 48 are moved into engagement with the shell to lock it against rotation.

In order that the knives 32 will exert suflicient gripping force on-the fuse ring F for the purpose in view, it is preferable to force them by the movement of the pistons 12- and 14 into engagement with the fuse ring under considerable pressure, the shell being supported against rearward movement at this time by a stop I10 (Fig. 1)

carried 'by the loading tray I8. Itis desirable is admitted to the left-hand sides of the Pistons I2 and". In the'rod 88 of the piston I4 is provided a passageway I I2, one end of which communicates with the cylinder I8 at the left of the piston (Fig. 5). The other end of this passageway communicates with one of the cylinders 80 (Fig. 5) through a pipe I I4,'a check valve I I8 and a pipe "8. After the valve member I58 has been moved into the position of Fig. 9, causing the pins 48 to be movedinto locking engagement with the shell, fluid under pressure flows through the pipe I18, check valve "8 and pipe I74 into the passageway I'I2 of the piston rod 88 and into the cylinder 18 to the left of the piston I4; The fluid also flows from the cylinder I8 through the pipe I42 into the cylinder I8 to the left of the piston I2. While it will be evident that the operating fluid acting on opposite sides of the pistons I2, I4 is under the same pressure per unit area, the effective areas of the "pistons on their right-hand sides is greater than on their opposite, or lefthand sides, so that the effect of admitting pressure to theleft-hand side of the pistons is to decrease the force-exerted on the knives 32-to hold them in engageinentwith the fuse ring F with the result; that the pressure of the knives on the fuse ring is' reduced sumciently to avoid any binding ofthe" fuse ring such as might tend to prevent it from being turned freely relatively to other-parts of the shell in the subsequent fuse setting operation. a

For turning the support 48 carrying the knives 82, thereby to setjthe' fuse, a fluid-pressure motor I80 is provided. is a rotary vane-type mot'oi' comprisinga vane I82 keyed to a. reduced portion I84 "of"'-the" knives support and rotat "able" within "a cylindrical chamber I 88 formed in the "housing 48. chamber I88 is provided housing acts on the finger I88 of the valve 84 to move the valve to the right until it reaches the position shown in Fig. which is the rest position of the machine. As soon as this position is reached, the valve elements 86 and 88 close off the passageways 99 and I88, whereupon the machine immediately comes to rest. During this return movement, the knives 82 are reset, by movement of the plunger 44, into the position of Fig. 4.

For thus moving the plunger, the rod 2H3 on which the plunger is carried extends beyond the ear housing 232 and engages the frame member 80 during the return movement of the housing 46. This causes movement of the rod 2"). to the left, whereupon the member 44 moves into position between the adjacent ends of the levers 34 to move the knives 32 again into operative positions.

In the event that the pressure acting on the vane I82. of the motor I88 during the return movements of the parts is insuiiicient to move the vane I82 back to its starting position, this movement will take place immediately at the beginning of the next fuse-setting operation. The fluid under pressure will act through the passageway I 44 of the piston rod 64, the pipe I46, passageway 252 of the valve member I56 and the port I92 to exert suflicient pressure against the vane to return it and hold it in its starting position until the valve member I58 is moved to the position of Fig. 9. Normally, however, the back pressure set up by the check valve 96 in the discharge line will be sumcient to cause this return movement of the vane I82.

With the machine at rest, the parts will be in the positions shown in Fig. 5. Upon movement of a shell from the magazine I4 (Fig. 1) into fusesetting position by the tray I B, the nose of the shell strikes the lower end I34 of the lever I30 (Fig. 4) which acts through the link I28 and the lever I26 to move the rod I (Fig. 5) to the right, which in turn causes movement of the valve member 84 into the position of Fig. 6. Fluid under pressure now flows into the cylinders 16 and I8 back of the pistons I2 and 14 to move the pistons to the left, which moves the housing 46 carried by the piston rods toward the shell. The knives 82 carried by the support 40 rotatable in the housing will thus be moved into engagement with the fuse ring F. After the knives have properly engaged the fuse ring, pressure to the right of the pistons I2 and 14 increases and acts on the valve piston 98 to move the valve member 84 into the position of Fig. '7 which traps the fluid to the left of the pistons 12 and I4 thus arresting movement of the housing 46. The fluid pressure now acts on the valve member I58 to move it into the position of Fig. 9 in which the fluid under pressure is effective to move the locking pins '48 into engagementwith the shell back of the fuse ring to prevent rotative movement of the shell as the fuse is set. The fluid under pressure also acts on the pistons I2 and I4 to relieve the pressure of the knives on the fuse ring thereby eliminating possibility of binding ofthe fusering as it is turned. At the same time, the fluid under pressure acts on the vane I82 of the motor I80, starting rotation of the motor and turning of the fuse ring F. When the fuse ring has turned a predetermined amount, as determined by the setting of the cam 2I2, the valve member I56 is moved upwardly to the position of Fig. 10, thus trapping the fluid on both sides of the vane I82 and immediately stopping its rotation. At the same time the plunger 44 is moved to the left. thus permitting the knives 82 to be moved by the spring 42 out of engagement with the fuse ring. The valve member 84 is again moved to the left by the increase in pressure on the piston 98 until it assumes the position shown in Fig. 8, whereupon fluid under pressure flows into the cylinders 18 and 18 to the left of the pistons I2 and 14 to move them andthe housing 46 back to their initi'al positions. The vane I82 of the motor I88 is also returned at this time and after the housing has moved sufliciently to the right, the knives 32 are reset by engagement of the rod 2Ill with the frame member 80, and the screw I36 carried with the housing returns the valve member 84 to the position of Fig. 5, whereupon the machine comes to rest. The transfer tray I6 may now be operated to move the shell into alinement with the breech of the gun, whereupon the shell is rammed and the gun is fired by suitable mechanism (not shown).

Certain features of the fluid-pressure system are not claimed herein but form the subjectsmatter of divisional applications, Serial No. 561,917 and Serial No. 561,918, filed November 4', 1944, in my name. The first of these applications covers the fluid-pressure motor by which rectilinear movement of the fuse-cutter head is efiected and the second application covers the arrangements of the fluid-pressure-operated motors and the means for causing sequential-openation thereof.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

work-engaging means,. and means operative in response to movement of the work-engaging means into engagement with the work piece for conducting fluid under pressure to said lastnamed fluid-pressure means.

2. In a machine for operating on work pieces, a work-engaging member. fluid-pressure means for moving said work-engaging member into en' gagement with a work piece, fluid-pressure means for turning said work-engaging member while it is in engagement with said work piece, means for holding at least part of the work against move ment during the turning movement of the workengaging means, fluid-pressure means for operating said holding means, and fluid-pressureoperated valve means for causing operation of all said fluid-pressure means according to a prede termined cycle.

3. In a machine for operating on work pieces, a work-engaging member, fluid-pressure means for moving said work-engaging member into engagement with a work piece, fluid-pressure means for turning said work-engaging member while it is in engagement with said work piece, means for holding at least part of the work against movement during the turning movement of the work-engaging means, fluid-pressure means for operating said holding means, fluid-pressureoperated valve means for causing operation of all said fluid-pressure means according to a predetermined cycle, and means for automatically bringing the work-eifgaging means to rest after a turning movement of predetermined extent.-

4. In a machine fort-operating"on:work*pieces, work-engaging means; fluid-pressure meanswfor moving said: work-engaginga means -into-engage m'entwith a. work piece; a other; :fi'uidE-pressure means for" turning "said; workz-engagingxmeans, and"fluid-pressure operatedsvalvemeans for conducting" fluid -under nressureito said other fluidpressure means only. after the workt-iengagin'g meanshas :been- :moved into: engagement-withv the work piece" and for automaticallyreversin the flow offluid underpressure-to aid first-named fluid-pressure" means=-tozretract the work engags ing means after the work-engaging" means has beentumedna predetermined: extent:

5. 'In' a machine ionoperatingaon workpieces. work-engagingimeansgmeans for moving-a work piece into position to'be operated upon by. said work-enga ing'means; fluid-pressure: means for moving said work-engaging means intoengagement with: the work piecerineresponser to such movement of the .wcrkpiecezand'. for: subsequently moving the work+engagingameansrout of engage ment. with. the work pieces. other: fluid-pressure means foriimparting motary-mmement toi-said work-engaging: meansawhilez saidi wonk+engaging means is inengagement :with the-workspiecei and fiuidi-pressureiresponsive means-for automatically determining the cycle of s-operations: the "ma Chillfik 6. In a machine for operating on work pieces. works engaging -mea ns, means "for moving -a work pece. into position to ibe operated upon "icy-said work-engaging means; fluid pressure means for moving said work-engagingmeans into engagement with the: work-piece in response --tosuch movement of the work piece 'an'd for subsequently moving th-eawork-engaging means-:out: of-"e'ngage mentwiththe: work;- :piece; *otherfiuid=pressure means i forimparting: rotary: movement to said worksengaging meanswhile i'n' engagem ant-"with the work-'- piece;- and 1 fluid pressurewesponsive means forzautomaticaily determiningit-he :cycieof operation of thezmachine; asaid last-namedrfiuids pressure means including;asmemberiadiustable.to vary and. determine--.the amount-.oftrotam move,- ment imparted to said -.work-engaging means.

7 In a machine :for. .operatingi -ontwork. pieces, a a-pair oi. work-'engaginirassembhes, .fluid-pres sure. means .for. moving said. assemblies intoland outof engagement withlaiwork piece, other fluid pressure. means for turning one oftsaid assemblies relatively to. the otherlwhen-in engagement with the. .work piece, and fluid-pressure-responsive means in control of. saidufiuid-ipressure means for automatically vdetermining the .cycleiofcoper. ation ofthe .machin'e.

8; In La machine, foroperatin'gon workipieces, apair of work-engaging. assemblies, fluid-press sure means for moving said assemblies into a and out of engagement with a workpiece, othenfiu'id pressure means for turing one of'saidiassemblies relative to" the other when in engagement with the workpiece; -fluid pressure responsive' means itr control of said fluid pressure means -forauto'a matically determining the cycleof" operation of themaehine, and means for bringing said one of said work engaging assemblies to restafter-a turning movement .of p'redetermined' extent;

- 9.14m amachinezionxoperatingz on -workvpleces', aaworks'engaging memberga a fluid-actuated? piston for moving said "member into engagement and out oft-engagement:with theiwork. piece; v a fiuid -pres sure-lmotori'for turning-said work-engaging memher! while in" engagementrswitn the work 1 piece: a fiuid pressure-actuated'i valver movablei from a;

: .I'engagingmembenmo a positioninzwhich the'zfluid under-pressure is conducted to the zothen-sideoi the piston =,.to :move the work engagingrmember away from the work :piece; and. a second: valve additionally controllingsthe fiow iof fluidiunder pressure-to said motonto bring the:work-engag:-

ing member: to a. rest automatically: after? aturning movement of predetermined. extent. 1

10; Ina machine for operatington'worle pieces, a. work-engagingwmember; a fiuid-actuatedrpision -for moving-said: member into: and .out 'of engagement with thevwork piece; a fluid-pressure motor for turning said work=engagingzrmember while in engagement with the :work piece, a pressure-actuated-= valve movablelfrom' a position in? which fluid:- under. :pressure vis conducted to-one side of 'th'episton to movevthe' work-engaging--member intot engagementwi-th the .work piece and to: the motor-to turnathe work-engaging;member-, to; a position in which the *fiuidiunder pressure. isrconducted: to therother: sid'eiof the piston" to movethe work-engagingmemberraway from-the workpiece, a-second valve additionally controlling the flow of fluid under pressure.- to'said motor to' bring the work-engaging: member to-a rest: after aturninggmovement of predetermined extent;v said piston having a passagewawtherethrough: communicating: with .-said second .valve through which fluid underwpressure flows to move said second valve intoa position in which fluid under pressurezis conducted-to said=motor after a predetermined pressure has been built up behind said piston, and means .acting: onszsaid second-valve to prevent such movement until said: predetermined." pressure has. been. obtained.

4015:; 11; In a machine; for-:operating-on-worin pieces,

a work-.engagingzmember, aafluid actuated piston for :moving saidsmember; into? andizouti of; engage mentzwith therwork piecepa fluidspressure motor for turning said; work-engaging :member/whilejn engagement with. thezwork piece; a; pressure-acituated valve movable from a :positiom in which fiuidiunderr pressure: isconducted to: one side :of the piston to move the work 'engaging: member into engagement with: the work piece and? tothe motor to turn the work-engaging: member; to a position in which thefluid under ipressure is conducted. to the. -.other side of the :piston to move the "work-engaging member away". from the: work piece, a secondtzva'lve additionally controlling:the flow-offluid'under pressure :to. said motor to:bring thework-engaging member to "a-rest-after"aturning movement: of: predeterminedi-extend, .fluid actuated means for moving s'aidzsecond valveto a position in which fiuid under "pressure. is con= ducted to said motorxto .turn'theiworkeengaging member; and .meansilforssclosinga said: valve to interrupt the operation: oft-said: motor after-it has turned the work-e'engagi-ng; memhenza-predetem mined extent.

12; In;a'machine'for operating on workfpieces; a work-engaging member, .a fluid actuatedipiston for moving said memberinto andiduti'flf engage; mentiwith'the .work:piece', a fluid pressureimotor for turning said worksengaging-" member while in engagement with theworkpiec'e, a pressure actuated valve movable'frdm a position in which fiuid'under pressure is conducted at one-side of the piston to move=the work-engaging member into engagement with the workpiece and to the motor to 't11rn the work engagmg'r' member-,-'- to a position in which the fluid under pressure is conducted to the other side of the piston to move the work-engaging member away from the work piece, a second valve additionally controlling the flow of fluid under pressure to said motor to stop the turning movement of the work-engaging member at a predetermined time, said piston having a passageway therethrough communicating with said second valve through which fluid under pressure flows to move said second valve into a position in which fluid under pressure is conducted to said motor after a predetermined pressure has been built up behind said piston, means acting on said second valve to prevent such movement until said predetermined pressure has been obtained, a second work-engaging member arranged to hold at least a portion of the work against turning movement, and means under the control of said second valve for operating said second work-engaging means to clamp said portion of the work against turning movement.

13. In a machine for setting fuses, fuse-setting means, means for moving a shell into position to be operated upon by said fuse-setting means, fluid-pressure-operated means responsive to such movement of the shell for moving the fuse-setting means into engagement with the fuse-adjusting member of the shell, means for holding the body of the shell against rotation, and fluidpressure means operative in response to movement of the fuse-setting means into engagement with the fuse-adjusting member of the shell for operating said holding means and for rotating said fuse-setting means.

14. In a machine for setting fuses, fuse-setting means, means for moving said fuse-setting means into engagement with the fuse-adjusting member of a shell, means for holding the shell against movement during the fuse-setting operation, means for imparting rotative movement to the fuse-setting means, and fluid-pressure means operative in response to movement of the fuse-setting means into engagement, with the fuse-adjusting member of the shell for operating said holding means and the means for imparting rotative movement to the fuse-setting means.

15. In a machine for setting fuses, fuse-setting means, means for moving said fuse-setting means into engagement with the fuse-adjusting member of a shell, means for holding the shell against movement during the fuse-setting operation, means for imparting rotative movement to the fuse-setting means, fluid-pressure means operafor automatically terminating operation of the fuse-setting means after the fuse-adjusting member has been turned a predetermined extent.

165. In a machine for setting fuses, fuse-setting means, a fluid-pressure-operated motor for moving the fuse-setting means into engagement with the fuse-adjusting member of a shell, a second fluid-pressure-operated motor for turning said fuse-setting means, fluid pressure operated valve means responsive to the operation of the first motor for admitting fluid under pressure to the second motor only after the fuse-setting means has been moved into engagement with the fuseadjusting member of the shell, and means operated by the second motor to close the valve means after the fuse-setting means has been turned a predetermined extent.

17. In a machine for setting fuses, fuse-setting means, a fluid-pressure-operated motor for moving the fuse-setting means into engagement with the iuse-adjusting member of a shell, a second iiuid-pressure-operated motor for turning said fuse-setting means, fluid pressure operated valve means responsive to the operation of the first motor for admitting fluid under pressure to the second motor only after the fuse-setting means has been moved into engagement with the fuseadjusting member of the shell, means operated by the second motor to close the valve means after the fuse-setting means has been turned a predetermined extent, and means operative in response to closure of said valve means for reversing the operation of the first-named motor to withdraw the fuse-setting means.

FRED C. EASTMAN.

REFER-ENGES CITED file of this patent:

UNITED STATES PATENTS Number Name Date 1,996,792 Gietmann Apr. 2, 1935 1,893,081 Dabrasky Feb. 21, 1933 2,301,098 Twyman Nov. 3, 1942 1,920,596 Schaier Aug. 1, 1933 585,649 Brinkman July 6, 1897 2,223,223 Muller Nov. 26, 1940 699,900 Schneider et al. May 13, 1902 1,144,974 Weaver June 29, 1915 1,278,038 Sharp Sept. 3, 1918 1,823,426 Ferris Sept. 15, 1931 2,130,317 Clarke Sept. 13, 1938 2,270,300 Hothersall Jan. 20, 1942 2,300,435 Ricciardi Nov. 3, 1942 1,911,138 Clute et a1 May 23, 1933 1,954,920 Damerell Apr. 1'7, 1934 2,271,717 Schwartz Feb. 3, 1942 

